Ceiling exhaust fan



FIG. 1 is a top plan view of a ceiling exhaust fan;

FIG. 2 is a side plan view thereof;

FIG. 3 is a left-side end plan view thereof;

FIG. 4 is a right-side end plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line showing of the concentric circular members is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a ceiling exhaust fan, as shown and described. 